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06/12/2023
Randomized least-squares with minimal oversampling and interpolation in general spaces
In approximation of functions based on point values, least-squares metho...
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09/19/2022
Nonlinear approximation spaces for inverse problems
This paper is concerned with the ubiquitous inverse problem of recoverin...
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04/26/2022
A sharp upper bound for sampling numbers in L_2
For a class F of complex-valued functions on a set D, we denote by g_n(F...
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05/12/2021
Optimal pointwise sampling for L^2 approximation
Given a function u∈ L^2=L^2(D,μ), where D⊂ℝ^d and μ is a measure on D, a...
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10/21/2020